File: grib_accessor_class_data_jpeg2000_packing.c

package info (click to toggle)
grib-api 1.9.0-1
  • links: PTS, VCS
  • area: main
  • in suites: squeeze
  • size: 28,008 kB
  • ctags: 10,015
  • sloc: ansic: 63,157; sh: 9,355; f90: 2,545; makefile: 2,496; yacc: 519; perl: 240; lex: 217
file content (544 lines) | stat: -rw-r--r-- 16,907 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
/**
 * Copyright 2005-2007 ECMWF
 *
 * Licensed under the GNU Lesser General Public License which
 * incorporates the terms and conditions of version 3 of the GNU
 * General Public License.
 * See LICENSE and gpl-3.0.txt for details.
 */

#include "grib_api_internal.h"

/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_data_simple_packing
   IMPLEMENTS = init
   IMPLEMENTS = unpack_double
   IMPLEMENTS = pack_double
   IMPLEMENTS = unpack_double_element
   IMPLEMENTS = value_count
   MEMBERS=const char*   type_of_compression_used
   MEMBERS=const char*   target_compression_ratio
   MEMBERS=const char*   ni
   MEMBERS=const char*   nj
   MEMBERS=const char*   list_defining_points
   MEMBERS=const char*   number_of_data_points
   MEMBERS=const char*   scanning_mode
   MEMBERS=int jpeg_lib
   MEMBERS=const char*   dump_jpg
   END_CLASS_DEF

 */

/* START_CLASS_IMP */

/*

Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "accessor.class" and rerun ./make_class.pl

*/

static int pack_double(grib_accessor*, const double* val,size_t *len);
static int unpack_double(grib_accessor*, double* val,size_t *len);
static long value_count(grib_accessor*);
static void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);
static int unpack_double_element(grib_accessor*,size_t i, double* val);

typedef struct grib_accessor_data_jpeg2000_packing {
    grib_accessor          att;
/* Members defined in gen */
/* Members defined in values */
	int  carg;
	const char* seclen;
	const char* offsetdata;
	const char* offsetsection;
	int dirty;
/* Members defined in data_simple_packing */
	const char*  units_factor;
	const char*  units_bias;
	const char*  changing_precision;
	const char*  number_of_values;
	const char*  bits_per_value;
	const char*  reference_value;
	const char*  binary_scale_factor;
	const char*  decimal_scale_factor;
/* Members defined in data_jpeg2000_packing */
	const char*   type_of_compression_used;
	const char*   target_compression_ratio;
	const char*   ni;
	const char*   nj;
	const char*   list_defining_points;
	const char*   number_of_data_points;
	const char*   scanning_mode;
	int jpeg_lib;
	const char*   dump_jpg;
} grib_accessor_data_jpeg2000_packing;

extern grib_accessor_class* grib_accessor_class_data_simple_packing;

static grib_accessor_class _grib_accessor_class_data_jpeg2000_packing = {
    &grib_accessor_class_data_simple_packing,                      /* super                     */
    "data_jpeg2000_packing",                      /* name                      */
    sizeof(grib_accessor_data_jpeg2000_packing),  /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    &init,                       /* init                      */
    0,                  /* post_init                      */
    0,                    /* free mem                       */
    0,                       /* describes himself         */
    0,                /* get length of section     */
    &value_count,                /* get number of values      */
    0,                 /* get number of bytes      */
    0,                /* get offset to bytes           */
    0,            /* get native type               */
    0,                /* get sub_section                */
    0,               /* grib_pack procedures long      */
    0,               /* grib_pack procedures long      */
    0,                  /* grib_pack procedures long      */
    0,                /* grib_unpack procedures long    */
    &pack_double,                /* grib_pack procedures double    */
    &unpack_double,              /* grib_unpack procedures double  */
    0,                /* grib_pack procedures string    */
    0,              /* grib_unpack procedures string  */
    0,                 /* grib_pack procedures bytes     */
    0,               /* grib_unpack procedures bytes   */
    0,            /* pack_expression */
    0,              /* notify_change   */
    0,                /* update_size   */
    0,            /* preferred_size   */
    0,                    /* resize   */
    0,      /* nearest_smaller_value */
    0,                       /* next accessor    */
    0,                    /* compare vs. another accessor   */
    &unpack_double_element,     /* unpack only ith value          */
    0,             		/* clear          */
};


grib_accessor_class* grib_accessor_class_data_jpeg2000_packing = &_grib_accessor_class_data_jpeg2000_packing;


static void init_class(grib_accessor_class* c)
{
	c->dump	=	(*(c->super))->dump;
	c->next_offset	=	(*(c->super))->next_offset;
	c->byte_count	=	(*(c->super))->byte_count;
	c->byte_offset	=	(*(c->super))->byte_offset;
	c->get_native_type	=	(*(c->super))->get_native_type;
	c->sub_section	=	(*(c->super))->sub_section;
	c->pack_missing	=	(*(c->super))->pack_missing;
	c->is_missing	=	(*(c->super))->is_missing;
	c->pack_long	=	(*(c->super))->pack_long;
	c->unpack_long	=	(*(c->super))->unpack_long;
	c->pack_string	=	(*(c->super))->pack_string;
	c->unpack_string	=	(*(c->super))->unpack_string;
	c->pack_bytes	=	(*(c->super))->pack_bytes;
	c->unpack_bytes	=	(*(c->super))->unpack_bytes;
	c->pack_expression	=	(*(c->super))->pack_expression;
	c->notify_change	=	(*(c->super))->notify_change;
	c->update_size	=	(*(c->super))->update_size;
	c->preferred_size	=	(*(c->super))->preferred_size;
	c->resize	=	(*(c->super))->resize;
	c->nearest_smaller_value	=	(*(c->super))->nearest_smaller_value;
	c->next	=	(*(c->super))->next;
	c->compare	=	(*(c->super))->compare;
	c->clear	=	(*(c->super))->clear;
}

/* END_CLASS_IMP */

static int first = 1;

#define JASPER_LIB 1
#define OPENJPEG_LIB 2

static void init(grib_accessor* a,const long v, grib_arguments* args)
{
	const char * user_lib=NULL;
	grib_accessor_data_jpeg2000_packing *self =(grib_accessor_data_jpeg2000_packing*)a;

	self->type_of_compression_used  = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->target_compression_ratio = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->ni                     = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->nj                     = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->list_defining_points   = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->number_of_data_points  = grib_arguments_get_name(a->parent->h,args,self->carg++);
	self->scanning_mode      = grib_arguments_get_name(a->parent->h,args,self->carg++);
	a->flags |= GRIB_ACCESSOR_FLAG_DATA;

#if HAVE_LIBJASPER
	self->jpeg_lib=JASPER_LIB;
#elif HAVE_LIBOPENJPEG
	self->jpeg_lib=OPENJPEG_LIB;
#endif

    if ((user_lib=getenv("GRIB_JPEG"))!=NULL ) {
	  if (!strcmp(user_lib,"jasper")) {
	  	self->jpeg_lib=JASPER_LIB;
	  } else if (!strcmp(user_lib,"openjpeg")) {
		self->jpeg_lib=OPENJPEG_LIB;
	  }
	}

	self->dump_jpg  = getenv("GRIB_DUMP_JPG_FILE");

	if(first) {
		if(self->dump_jpg)
			printf("GRIB JPEG dumping to %s\n",self->dump_jpg);
		first = 0;
	}

}

static long value_count(grib_accessor* a)
{
	grib_accessor_data_jpeg2000_packing *self =(grib_accessor_data_jpeg2000_packing*)a;
	long n_vals= 0;

	if(grib_get_long_internal(a->parent->h,self->number_of_values,&n_vals) != GRIB_SUCCESS)
		return 0;

	return n_vals;
}

#define EXTRA_BUFFER_SIZE 10240

#ifdef HAVE_JPEG
static int  unpack_double(grib_accessor* a, double* val, size_t *len)
{
	grib_accessor_data_jpeg2000_packing *self =(grib_accessor_data_jpeg2000_packing*)a;

	int err = GRIB_SUCCESS;
	int i;
	size_t buflen = grib_byte_count(a);

	double bscale = 0;
	double dscale = 0;
	unsigned char* buf = NULL;
	size_t n_vals = 0;

	long binary_scale_factor = 0;
	long decimal_scale_factor = 0;
	double reference_value = 0;
	long bits_per_value =0;
	double units_factor=1.0;
	double units_bias=0.0;

	n_vals = grib_value_count(a);

	if(self->units_factor)
	    grib_get_double_internal(a->parent->h,self->units_factor,&units_factor);

	if(self->units_bias)
	    grib_get_double_internal(a->parent->h,self->units_bias,&units_bias);


	if((err = grib_get_long_internal(a->parent->h,self->bits_per_value,&bits_per_value)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_double_internal(a->parent->h,self->reference_value, &reference_value)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->binary_scale_factor, &binary_scale_factor)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->decimal_scale_factor, &decimal_scale_factor)) != GRIB_SUCCESS)
		return err;

	self->dirty=0;

	bscale = grib_power(binary_scale_factor,2);
	dscale = grib_power(-decimal_scale_factor,10);

	/* TODO: This should be called upstream */
	if(*len < n_vals)
		return GRIB_ARRAY_TOO_SMALL;

	/* Special case */

	if(bits_per_value == 0)
	{
		for(i = 0; i < n_vals; i++)
			val[i] = reference_value;
		*len = n_vals;
		return GRIB_SUCCESS;
	}

	buf = (unsigned char*)a->parent->h->buffer->data;
	buf += grib_byte_offset(a);

    switch (self->jpeg_lib) {
		case OPENJPEG_LIB:
			if ((err = grib_openjpeg_decode(a->parent->h->context,buf,&buflen,val,&n_vals)) != GRIB_SUCCESS)
				return err;
			break;
		case JASPER_LIB:
			if ((err = grib_jasper_decode(a->parent->h->context,buf,&buflen,val,&n_vals)) != GRIB_SUCCESS)
				return err;
			break;
	}

	*len = n_vals;

	for (i = 0; i < n_vals; i++) {
		val[i] = (val[i] * bscale + reference_value) * dscale;
	}
	if (units_factor != 1.0) {
		if (units_bias != 0.0)
			for (i=0;i<n_vals;i++) val[i]=val[i]*units_factor+units_bias;
		else
			for (i=0;i<n_vals;i++) val[i]*=units_factor;
	} else if (units_bias != 0.0)
        for (i=0;i<n_vals;i++) val[i]+=units_bias;

	return err;
}

static int pack_double(grib_accessor* a, const double* cval, size_t *len)
{
	grib_accessor_data_jpeg2000_packing *self =(grib_accessor_data_jpeg2000_packing*)a;
    grib_accessor_class* super = *(a->cclass->super);
	size_t n_vals = *len;
	int err = 0;
	int i;
	double reference_value = 0;
	long   binary_scale_factor = 0;
	long   bits_per_value = 0;
	long   decimal_scale_factor = 0;
	double decimal = 1;
	size_t simple_packing_size = 0;
	unsigned char*  buf = NULL;
	double divisor = 1;
	long width;
	long height;
	long ni;
	long nj;
	long target_compression_ratio;
	long type_of_compression_used;
	long scanning_mode;
	long list_defining_points;
	long number_of_data_points;
    int ret =0;
	j2k_encode_helper helper;
	double units_factor=1.0;
	double units_bias=0.0;
	double* val=(double*)cval;

    self->dirty=1;

    if(*len == 0){
      grib_buffer_replace(a, NULL, 0, 1, 1);
      return GRIB_SUCCESS;
    }

	if(self->units_factor &&
		  (grib_get_double_internal(a->parent->h,self->units_factor,&units_factor)== GRIB_SUCCESS)) {
		grib_set_double_internal(a->parent->h,self->units_factor,1.0);
	}

	if(self->units_bias &&
		   (grib_get_double_internal(a->parent->h,self->units_bias,&units_bias)== GRIB_SUCCESS)) {
			  grib_set_double_internal(a->parent->h,self->units_bias,0.0);
	}


    if (units_factor != 1.0) {
        if (units_bias != 0.0)
            for (i=0;i<n_vals;i++) val[i]=val[i]*units_factor+units_bias;
        else
            for (i=0;i<n_vals;i++) val[i]*=units_factor;
    } else if (units_bias != 0.0)
        for (i=0;i<n_vals;i++) val[i]+=units_bias;

    ret = super->pack_double(a,val,len);
    switch (ret) {
      case GRIB_CONSTANT_FIELD:
        grib_buffer_replace(a, NULL, 0,1,1);
        return GRIB_SUCCESS;
        break;
      case GRIB_SUCCESS:
        break;
      default:
        grib_context_log(a->parent->h->context,GRIB_LOG_ERROR,"unable to compute packing parameters\n");
        return ret;
    }

  if((ret = grib_get_double_internal(a->parent->h,self->reference_value, &reference_value))
      != GRIB_SUCCESS)
    return ret;

  if((ret = grib_get_long_internal(a->parent->h,self->binary_scale_factor, &binary_scale_factor))
      != GRIB_SUCCESS)
    return ret;

  if((ret = grib_get_long_internal(a->parent->h,self->bits_per_value,&bits_per_value)) !=
      GRIB_SUCCESS)
    return ret;

  if((ret = grib_get_long_internal(a->parent->h,self->decimal_scale_factor, &decimal_scale_factor))
     != GRIB_SUCCESS)
    return ret;


    decimal = grib_power(decimal_scale_factor,10) ;
    divisor = grib_power(-binary_scale_factor,2);

	simple_packing_size = (((bits_per_value*n_vals)+7)/8)*sizeof(unsigned char);
	buf  = grib_context_malloc_clear(a->parent->h->context,simple_packing_size+EXTRA_BUFFER_SIZE);
	if(!buf) {
		err = GRIB_OUT_OF_MEMORY;
		goto cleanup;
	}

	if((err = grib_get_long_internal(a->parent->h,self->ni,&ni)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->nj,&nj)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->type_of_compression_used,&type_of_compression_used)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->target_compression_ratio,&target_compression_ratio)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->scanning_mode,&scanning_mode)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->list_defining_points,&list_defining_points)) != GRIB_SUCCESS)
		return err;
	if((err = grib_get_long_internal(a->parent->h,self->number_of_data_points,&number_of_data_points)) != GRIB_SUCCESS)
		return err;

	width  = ni;
	height = nj;

	if((scanning_mode & (1<<5)) != 0)
	{
		long tmp = width;
		width    = height;
		height   = tmp;
	}

	/* The grid is not regular */
	if(list_defining_points != 0)
	{
		width  = *len;
		height = 1;
	}

	/* There is a bitmap */
	if(*len != number_of_data_points)
	{
		width  = *len;
		height = 1;
	}

	if(width*height != *len)
	{
		/* fprintf(stderr,"width=%ld height=%ld len=%d\n",(long)width,(long)height,(long)*len); */
		Assert(width*height == *len);
	}

	switch( type_of_compression_used)
	{
		case 0:
			Assert(target_compression_ratio == 255);
			helper.compression = 0;
			break;

		case 1:
			Assert(target_compression_ratio != 255);
			Assert(target_compression_ratio != 0);
			helper.compression = target_compression_ratio;
			break;

		default:
			err = GRIB_NOT_IMPLEMENTED;
			goto cleanup;
	}

	helper.jpeg_buffer     = buf;
	helper.width           = width;
	helper.height          = height;
	helper.bits_per_value  = bits_per_value;

	helper.buffer_size     = simple_packing_size + EXTRA_BUFFER_SIZE;
	helper.values          = val;
	helper.no_values       = n_vals;
	helper.reference_value = reference_value;
	helper.divisor         = divisor;
	helper.decimal         = decimal;

    switch (self->jpeg_lib) {
		case OPENJPEG_LIB:
			if ( (err = grib_openjpeg_encode(a->parent->h->context,&helper)) != GRIB_SUCCESS ) goto cleanup;
			break;
		case JASPER_LIB:
			if ( (err = grib_jasper_encode(a->parent->h->context,&helper)) != GRIB_SUCCESS ) goto cleanup;
			break;
	}

	if(helper.jpeg_length > simple_packing_size)
		grib_context_log(a->parent->h->context, GRIB_LOG_WARNING,
				"grib_accessor_data_jpeg2000_packing(%s) : jpeg data (%ld) larger than input data (%ld)",
				self->jpeg_lib==OPENJPEG_LIB ? "openjpeg" : "jasper",
				helper.jpeg_length, simple_packing_size);

	Assert( helper.jpeg_length <= helper.buffer_size);

	if(self->dump_jpg) {
		FILE *f = fopen(self->dump_jpg,"w");
		if(f) {
			if(fwrite(helper.jpeg_buffer,helper.jpeg_length,1,f) != 1)
				perror(self->dump_jpg);
			fclose(f);
		}
		else perror(self->dump_jpg);

	}

	grib_buffer_replace(a, helper.jpeg_buffer, helper.jpeg_length, 1, 1);

cleanup:

	grib_context_free(a->parent->h->context,buf);

	if(err == GRIB_SUCCESS)
		err = grib_set_long_internal(a->parent->h,self->number_of_values, *len);
	return err;

}
#else

static int  unpack_double(grib_accessor* a, double* val, size_t *len)
{
	grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
			"jpeg support not enabled. Please rerun configure with the --with-jasper or --with-openjpeg option.");
	return GRIB_NOT_IMPLEMENTED;
}

static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
	grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
			"jpeg support not enabled. Please rerun configure with the --with-jasper or --with-openjpeg option.");
	return GRIB_NOT_IMPLEMENTED;
}

#endif

static int  unpack_double_element(grib_accessor* a, size_t idx, double* val)
{
	size_t size;
	double* values;
	int err=0;

	err=grib_get_size(a->parent->h,"values",&size);
	if (err) return err;
	if (idx > size) return GRIB_INVALID_NEAREST;
	
	values=grib_context_malloc_clear(a->parent->h->context,size*sizeof(double));
	err=grib_get_double_array(a->parent->h,"values",values,&size);
	if (err) return err;
	*val=values[idx];
	grib_context_free(a->parent->h->context,values);
	return err;
}